Thomas barfield



distinti gisten @anni @ritira 'ritenne BARFIELD, OFATHENS, ILLINois.

Letters Patent No. 89,725, dated May 4, 1869.

IMPRVED DEVICE POR PREVETING INCRUSTATION IN BOILERS.

The Schedule referred to in -these Lettera Patent and` making part of the same.

To all whom it may concern.-

Beit known that I, THOMAS BARFIELD, of' Athens, in the county of Menard, and State of Illinois, have invented a new and useful Improved Water-Puritier for Steam-Boilers, of xvhich the'tollowing is a full, clear, and exact description, reference being had to the annexed d1awng,.making a part of thisspecification, and representing a vertical elevation of the purifying-tank, with a portion of same in section.

The object of my invention is to purify the feedwater for steam-boilers from the lime and other 'erystallizable salts contained in it, and thereby prevent the deposit and incrustation in 'the boiler.

It consists of an iron tank', A, of' suitable size, having a man-hole in the top, covered by a plate, b, through the centre of which passes aspindle, c, resting on the step d, in the inside of the tank, and alsopassing through the yoke e, and terminating in a driving-wheel, h, connected by a belt, k, with the engine.

Near the foot of this spindle is placed a toothed wheel s.

The pipe n, connecting with the reservoir, supplies the` tank with water, which, by a force-pump conneeted with 12, is carried to the boiler.

The dead steam from the engine enters `the tank through the pipe o, and passes out through m'.

The Water entering n, falls upon the toothed wheel s, which rapidly revolving cuts it, and throws it in a spray on the sides of the tank heated by the steam, down which it tric-kies, depositingl in its course the lime and crystallizable salts contained in it, in the form of an incrustation on the sides of the tank, so that when it reaches the bottom it is'clear and pure, ready to be forced directly. to .the boiler through p.

In order to increase the surface, I frequently hang common ropes from the top of the tank, which can be removed and others substituted, as desired.

Care must be taken to keep the water in the tank low enough not to interfere with the process` of incrustation. 1

To give an idea of the dimensions of the various parts, Iwill give those ofthe one now u sed byme with a sixty-fourhorse engine: A

The tank is four feet in diameter at the top and six feet in length; the toothed Wheel about sixteen'inches in diameter, placed about six inches iiom the top of lthe tank, 'and madeto revolve about. one hundredand fifty times a minute. The pipe n is three-quarters of an inch, and p one and one-quarter of an ineh in diameter, so that only about ten inches of Water stand in the tank.

I am well aware that attempts have been madek n tofore to purify feed-Water for steam-boilers, by. pass ing it over perforated plates in a tank, through which .l

steamv is made to pass, so I-do not claim any novelty in the principle; but

What I do claim as my invention, and desire to secure by Letters Patent, is-

The toothed wheel s, with its spindle and drivingwheel, when arranged, with reference to the pipes in n o p and the tank A, substantially as herein specified.

Witnesses: THOMAS BARFIELD.

` PETER GRAHAM,

J. M. J onDAN. 

